Smartphones are a class piece in communications today. Users want to keep them active as long as possible. The battery, however, runs out after several hours of use. To replace the recharge, they have designed a wireless laser charger that works up to 30 meters away.

The innovation is the result of studies by a group of Korean engineers, who realized that wireless charging is not done through the air. From there, they focused on an infrared laser system that sends charge to multiple phones at once.

You can also send load to other equipment such as laptops. This is much more convenient and efficient for users of these devices, who can continue working without interruption.

The test phase allows a 400 mW light beam to be sent 30 meters, “where the 10×10 mm receiver converted it into 85 mW of electrical energy, enough to charge devices.”

According to the New Atlas publication, the receiver “has a point where this incoming light is directed, where there is a photovoltaic cell waiting to absorb the light and produce electricity.” That’s how it works.

According to the developers, the wireless laser charger can be placed wherever the user wants it, connected to the receiver that could be built into smartphones.

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Source: fayerwayer

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The WiFi wireless connectivity standard meets this September 30, 22 years since the launch back in 1999 of the first version of the technology, 802.11b. This tool is the main mode of access to the Internet today. According to Cisco data, half of the world’s Internet traffic passes through these connections.

This data places WiFi far ahead of other technologies, as it far exceeds cable (24 %) and cellular (12 %) traffic. In the next two decades, the wireless network lived through several generations. In 2009, 802.11n (WiFi 4) arrived, multiplying the maximum transmission rate by nine, which went from 54 Mbps to 450 Mbps. In 2013, WiFi 5 reached a maximum speed greater than 1 Gbps.

Currently, the latest standard (802.11ax or WiFi 6) is being massively implemented, which represents a great advance in terms of speed (up to 4.8 Gbps per access point) and capacity (up to 400 % increase).

This system was launched in 2019 but it is increasingly widespread in devices and networks, and uses OFDMA (Orthogonal Frequency Division Multiple Access) technology that reduces latency, as well as Color BBS to avoid interference.

It also has a variant, WiFi 6E, which takes advantage of the spectrum using the 6 GHz band of the electromagnetic spectrum, which is added to the 2.4 and 5 GHz already existing in WiFi 6. In addition to connecting to the Internet with computers and mobile devices, WiFi networks can be used to connect Internet of Things devices.

Source: dpa

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